Piedmont Municipal Authority water quality report, rewritten
- Serves
- 7,542
- Connections
- 2,951
- Water source
- Surface water bought from another system
- Based in
- Piedmont, OK
- County
- Canadian
- Owner
- Local government
PWSID OK2000909 · EPA data
Read this first
- Lithium (above EPA’s health benchmark) was found in eight of 8 samples, highest 49.7 ppb. Above EPA’s health reference level of 10 ppb, a screening level rather than an enforceable limit.
8 health-based violations since 2016. Details are below.
What was found
Highlighted: above the health goal, or EPA’s health benchmark where there is no goal. Circled: above the legal limit in at least one sample, or the action level. Every scale puts that line at its middle.
PFAS and lithium: EPA UCMR 5, samples taken from Jan. 11, 2023 to Oct. 4, 2023. Each blue tick on a scale is one sample where it was found.
Lithium (above EPA’s health benchmark)
Comes from the source
49.7ppb
Highest of 8 samples; found in eight
Above EPA’s health reference level of 10 ppb, a screening level rather than an enforceable limit.
What handles it
No certification claim covers this compound yet.
Also found, with no federal limit
EPA measured these PFAS to learn how often they occur. None has a legal limit or a health goal yet.
| Compound | Highest sample | Found in | Certification claim |
|---|---|---|---|
| PFBA | 5.9 ppt | 2 of 8 | None covers it |
| PFPeA | 3.6 ppt | 4 of 8 | None covers it |
| PFHxA | 3.3 ppt | 1 of 8 | None covers it |
Tested and not found
Below EPA’s minimum reporting level in every sample taken from Jan. 11, 2023 to Oct. 4, 2023. Not found means not measured above that level, which is not the same as zero.
All 27 compounds tested and not found
- 11Cl-PF3OUdS
- 4:2 FTS
- 6:2 FTS
- 8:2 FTS
- 9Cl-PF3ONS
- ADONA
- HFPO-DA (GenX)
- Lead
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFBS
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- PFOS
- PFPeS
- PFTA
- PFTrDA
- PFUnA
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| Lead and Copper Rule Revisions | The required inventory of lead service lines was not completed or submitted on time.EPA: LSL Inventory | Oct. 17, 2024 | — | Resolved |
| Gross alpha radiation (excluding radon and uranium) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2024 to March 31, 2024 | 18 PCI/L | Resolved |
| Gross alpha radiation (excluding radon and uranium) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Oct. 1, 2023 to Dec. 31, 2023 | 16 PCI/L | Resolved |
| Gross alpha radiation (excluding radon and uranium) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | July 1, 2023 to Sept. 30, 2023 | 21 PCI/L | Resolved |
| Combined Uranium | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2016 to June 30, 2016 | 96 UG/L | Resolved |
| Gross alpha radiation (excluding radon and uranium) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2016 to June 30, 2016 | 28 PCI/L | Resolved |
| Combined Uranium | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2016 to March 31, 2016 | 96 UG/L | Resolved |
| Gross alpha radiation (excluding radon and uranium) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2016 to March 31, 2016 | 28 PCI/L | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 37 monitoring or reporting violations not shown. | ||||
What this report cannot tell you
- Levels of everything else. Federal bulk data carries results for PFAS, lithium, lead and copper, and violations for the rest. Nitrate, arsenic, disinfection byproducts and other levels are in Piedmont Municipal Authority’s own annual report, which it must send you every year.
- Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
- Anything after the latest data. SDWIS data is from 2026 Q2; UCMR 5 samples are from Jan. 11, 2023 to Oct. 4, 2023.
Other Oklahoma utilities
- Oklahoma City644,000
- Tulsa413,000
- Broken Arrow Municipal Authority116,330
- Norman Utilities Authority104,868
- Lawton92,757
- Edmond Pwa79,408
- Midwest City55,935
- Moore Public Works Authority55,083
- Stillwater Utilities Authority53,000
- Enid49,347
- Muskogee Municipal Authority38,310
- Bartlesville34,748
Sources
- EPA UCMR 5 occurrence data, file of Aug. 27, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q2
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
What to do next
Read up on Lithium
What each one does to health, where it comes from, and the certification claim that addresses it.
About LithiumGet the utility’s own report
Piedmont Municipal Authority must send you a water quality report every year. It lists nitrate, arsenic and byproduct levels this page cannot.
How to read itTest your own tap for lead
Your service line, solder and fixtures decide the lead at your faucet, not the utility’s average.
Lead in your water: what to doDecide if you want a filter at all
A filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.
NSF/ANSI standards, decoded